RESUMEN
ABSTRACT Zygothrica is a genus of Drosophilidae (Diptera) whose species utilize flowers and fungi for breeding sites, with records of fungi being used as courtship arena. Due to this habit, its representation in Drosophilidae surveys using banana-baited traps is generally low. However, Zygothrica orbitalis was well represented in a few samples with these traps. In this study, we report for the first time the breeding site of Z. orbitalis in living fruits of Psychotria brachyceras (Rubiaceae), noting that the use of living fruits is rare among Drosophilidae. The fructification of the plant occurs in the area of study from May to August, with previous collection records of the species in the Restinga (sandbank or strand) forest. Additionally, the emergence of some individuals of the invasive species Drosophila suzukii was observed, which highlights the necessity for continuous study of this plant to understand the dynamics between a native and an exotic species. Besides the ecological importance, our results are relevant for understanding the evolution of trophic resource use by the Zygothrica genus.
RESUMEN
O número de pétalas é um dos caracteres taxonômicos utilizados na circunscrição dos subgêneros de Polygala. Até o momento, a corola das espécies do subgênero Hebeclada era descrita apresentando apenas três pétalas, uma inferior e central, denominada carena e duas laterais superiores aderidas à bainha estaminal. Dentre os 12 subgêneros de Polygala, a ocorrência de corola trímera era registrada apenas nos subgêneros Polygala e Hebeclada. O presente trabalho trata da ocorrência inédita de corola pentâmera em espécies de Polygala do subgênero Hebeclada, apresentando fotografias e comentários adicionais sobre estas pétalas reduzidas, não referidas para o subgênero até o momento.
The number of petals in the flowers is a taxonomic character used in the circumscription of the subgenera of Polygala. Until now, the corolla of the species of subgenus Hebeclada was described having tree petals, one inferior and central called carina and two lateral adnated to the staminal sheath. Among the 12 subgenera of Polygala, the occurrence of trimerous corolla was only known in subgenera Polygala and Hebeclada. This paper presents the discovery of pentamerous corolla in species of Polygala subgenus Hebeclada, presenting photos and additional comments about this reduced petals unknown for the subgenus until this moment.